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Investments - Investment Portfolio by Major Security Type (Detail) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | ---
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 89,762 | $ 77,741 | $ 75,352
Gross Unrealized Gains | 1,099 | 145 | 1,072
Gross Unrealized Losses | (850) | (1,935) | (1,258)
Net Holding Period Gains (Losses) | 13 | (4) | 2
Total available-for-sale securities | $ 90,024 | $ 75,947 | $ 75,168
% of Total Fair Value | 95.20% | 94.60% | 94.70%
Equity securities, at Fair Value |  |  |
Cost | $ 1,262 | $ 1,501 | $ 1,493
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 0 | 0 | 0
Net Holding Period Gains (Losses) | 3,223 | 2,802 | 2,739
Fair Value | $ 4,485 | $ 4,303 | $ 4,232
% of Total Fair Value | 4.80% | 5.40% | 5.30%
Debt and Equity Securities, at Fair Value |  |  |
Cost | $ 91,024 | $ 79,242 | $ 76,845
Gross Unrealized Gains | 1,099 | 145 | 1,072
Gross Unrealized Losses | (850) | (1,935) | (1,258)
Net Holding Period Gains (Losses) | 3,236 | 2,798 | 2,741
Fair Value | $ 94,509 | $ 80,250 | $ 79,400
% of Total Fair Value | 100.00% | 100.00% | 100.00%
Unsettled security transactions, payable | $ 523 |  | $ 469
Other receivable from broker-dealer and clearing organization |  | $ 125 |
Total fair value of non-insurance subsidiary portfolio | 4,900 | 6,200 | 4,100
Nonredeemable preferred stocks |  |  |
Equity securities, at Fair Value |  |  |
Cost | 454 | 756 | 760
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 0 | 0 | 0
Net Holding Period Gains (Losses) | (16) | (28) | (25)
Fair Value | $ 438 | $ 728 | $ 735
% of Total Fair Value | 0.50% | 0.90% | 0.90%
Common equities |  |  |
Equity securities, at Fair Value |  |  |
Cost | $ 808 | $ 745 | $ 733
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 0 | 0 | 0
Net Holding Period Gains (Losses) | 3,239 | 2,830 | 2,764
Fair Value | $ 4,047 | $ 3,575 | $ 3,497
% of Total Fair Value | 4.30% | 4.50% | 4.40%
Total fixed maturities |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 88,247 | $ 77,126 | $ 74,595
Gross Unrealized Gains | 1,099 | 145 | 1,072
Gross Unrealized Losses | (850) | (1,935) | (1,258)
Net Holding Period Gains (Losses) | 13 | (4) | 2
Total available-for-sale securities | $ 88,509 | $ 75,332 | $ 74,411
% of Total Fair Value | 93.60% | 93.90% | 93.70%
Total fixed maturities | U.S. government obligations |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 51,021 | $ 47,103 | $ 44,231
Gross Unrealized Gains | 731 | 36 | 772
Gross Unrealized Losses | (413) | (1,151) | (574)
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 51,339 | $ 45,988 | $ 44,429
% of Total Fair Value | 54.30% | 57.30% | 56.00%
Total fixed maturities | State and local government obligations |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 3,320 | $ 2,893 | $ 2,681
Gross Unrealized Gains | 20 | 2 | 10
Gross Unrealized Losses | (65) | (117) | (90)
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 3,275 | $ 2,778 | $ 2,601
% of Total Fair Value | 3.50% | 3.50% | 3.30%
Total fixed maturities | Foreign government obligations |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 16 | $ 16 | $ 17
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 0 | 0 | (1)
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 16 | $ 16 | $ 16
% of Total Fair Value | 0.00% | 0.00% | 0.00%
Total fixed maturities | Corporate and other debt securities |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 18,621 | $ 14,111 | $ 14,970
Gross Unrealized Gains | 270 | 65 | 222
Gross Unrealized Losses | (86) | (215) | (156)
Net Holding Period Gains (Losses) | 12 | (7) | 0
Total available-for-sale securities | $ 18,817 | $ 13,954 | $ 15,036
% of Total Fair Value | 19.90% | 17.40% | 18.90%
Total fixed maturities | Residential mortgage-backed securities |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 2,979 | $ 1,600 | $ 1,404
Gross Unrealized Gains | 26 | 9 | 24
Gross Unrealized Losses | (6) | (11) | (6)
Net Holding Period Gains (Losses) | 1 | 3 | 2
Total available-for-sale securities | $ 3,000 | $ 1,601 | $ 1,424
% of Total Fair Value | 3.20% | 2.00% | 1.80%
Total fixed maturities | Commercial mortgage-backed securities |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 5,916 | $ 4,721 | $ 4,664
Gross Unrealized Gains | 17 | 7 | 4
Gross Unrealized Losses | (247) | (376) | (377)
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 5,686 | $ 4,352 | $ 4,291
% of Total Fair Value | 6.00% | 5.40% | 5.40%
Total fixed maturities | Other asset-backed securities |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 6,374 | $ 6,682 | $ 6,628
Gross Unrealized Gains | 35 | 26 | 40
Gross Unrealized Losses | (33) | (65) | (54)
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 6,376 | $ 6,643 | $ 6,614
% of Total Fair Value | 6.70% | 8.30% | 8.30%
Short-term investments |  |  |
Debt Securities, Available-for-Sale, at Fair Value |  |  |
Cost | $ 1,515 | $ 615 | $ 757
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 0 | 0 | 0
Net Holding Period Gains (Losses) | 0 | 0 | 0
Total available-for-sale securities | $ 1,515 | $ 615 | $ 757
% of Total Fair Value | 1.60% | 0.70% | 1.00%

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